CALPUFF View is a PRE- and POST-Processor for CALPUFF.
The CALPUFF modeling system has 3 main components:
- CALMET (a diagnostic 3-D meteorological model)
- CALPUFF (the transport and dispersion model), and
- CALPOST (a postprocessing package).
This system is a comprehensive modeling tool that includes meteorological and geophysical data processors, a meteorological model, a puff-based dispersion model, and post-processing modules.
CALPUFF is already in use to model numerous air quality scenarios, including:
- Toxic pollutant deposition
- Near-field impacts from
- Forest fire impacts
- Visibility assessments
- Long range transport studies.
- Complete pre- and post-processor interface for CALPUFF & CALMET
- Up to 100 times easier to use than plain CALPUFF & CALMET.
- Transparently integrates all geophysical data (terrain, land use, meteorology).
- Automatically downloads maps and terrain data from the Web.
- Outstanding post-processors: such as 3D-wind fields, contour plots, XY graphics, and puff representations.
- See terrain and results in photo-realistic and animated tools (zoom, rotate, print).
- Reads output files from CALMET, CALPUFF, and CALGRID.
- Point, area, volume, and line sources.
- Non-steady-state emissions and meteorological conditions.
- Calm wind algorithm.
- Causality effects.
- Efficient sampling functions.
- Dispersion coefficient options.
- Boundary layer turbulence.
- Vertical wind shear.
- Plume rise.
- Building downwash
- Subgrid scale complex terrain (CTDM)
- Dry Deposition
- Overwater and coastal interaction effects.
- Chemical transformation options
- Wet removal
- Graphical User Interfaces
- Buoyant area source algorithm
- Buoyant line source capability
- Wind shear effects - Puff splitting
- ISC input conversion program
- BPIP interface
- Split sigmas
- Output data compression
- Recent Developments - CALMET
- MM4/MM5 interface
- Use of satellite cloud data
- Similarity theory options
- Map factors
- Interpolation of precipitation data
- Slope flow improvements
- Terrain angle, orientation and shadowing effects.
CALPUFF VIEW ADVANTAGES
A preliminary consideration on advantages of a puff model, such as CALPUFF, over plume models such as ISCST3 should be based on the following modeling requirements:
- Whether the straight-line
steady-state assumptions on which a plume model is based are
- Transport distances.
- Potential for temporally
and/or spatially varying flow fields due to influences of
- Non-uniform land use
- Coastal effects.
- Calm winds and stagnation
- Variable wind directions.
For cases involving a high
degree of spatial variability of the flow within the boundary
layer, such as upslope or downslope flows or flows along a
winding river valley, the straightline, steady state assumption
may not be valid beyond even a few kilometers, and a puff model
may be more appropriate.
Puff models have a more realistic presentation of
dispersion than plume models.
Each of these programs has a
graphical user interface (GUI). In addition to these
components, there are several other processors that may be used
- Geophysical (land use and
terrain) data in many standard formats,
- Meteorological data (surface,
upper air, precipitation, and buoy data), and
- Interfaces to other models,
like Penn State/NCAR Mesoscale Model (MM5).
Other Advantages Include:
- Complex Terrain
- Stagnation, inversion, recirculation, and fumigation conditions.
- Overwater transport
- Coastal conditions
- US EPA recommended model for Long Range Transport.
- Near-fields impacts
- Visibility assessments
- Class I area impact studies
- Criteria pollutants modeling
- State Implementation Plan (SIP) applications.
- Secondary pollutant formation and particulate matter modeling.
- area and line sources.